BEBAN BIOMEKANIK SEBAGAI FAKTOR RISIKO TERJADINYA OSTEOARTRITIS LUTUT ( studi kasus di poli reumatik RS Dr Kariadi Semarang)

Abstract

Introduction. One of knee osteoarthritis (OA)’s risk factors is biomechanic load. Biomechanic load as risk factor has been researched by researcher. In Bandungan study (1992) (50 cases and 50 controls) reported that mechanic increased the risk of knee OA (OR=7.67; 95% CI= 2.17-33.23; p= 0.0002). A recent study of IOWA medical students found that 13.9% of those who had a knee injury including meniscal, ligamentous or bone injury during adolescent and young adulthood developed knee OA, as compared with just 6.0% of those who did not have a knee injury. Objective. To examine the association between biomechanic load and the risk of knee OA in the patients of Rheumatologic Department Karyadi Hospital Methods. An observation analytical research with case control design compared 35 cases with knee OA (diagnosed with clinic and radiographic criteria of knee OA by Altmann 1991) with 35 controls which do not have knee OA, matched for age and gender. Biomechanic load restrictions are weight of load (kg), frequency of working with heavy load (times/ day), duration of working with heavy load (years), geographical condition of working with heavy load (hilly or plain area). Data were gathered with questionairs. Epi info 6 SPSS for Windows Release 13.0 were used for statistical analysis. Chisquare were used for nominal data. Odds ratio were used to decide the risk factor. Results. The odds ratio of biomechanic was 3.33 (95%confidensial interval(CI) = 0.86-18.85) with p = 0.096. The odds ratio of working with standing was 2.25 (95%CI 95% = 0.63-10.00) with p = 0.267. The odds ratio of knee trauma was 3.00 ( 95% CI = 0.75-17.23) with p = 0.149. The odds ratio of working with cycling was 2.00 (95% CI = 0.62-7.46) with p = 0.302. The odds ratio of working with walking was 1.00 (95% CI = 0.30-3.34) with p = 0.789. Conclusions. There were no significant differences between cases and control for the risk factors of working with biomechanic load, working with standing, knee trauma history, working with cycling and working with walking Suggestion. It needs further research with more samples. Key Words: Case-control study, knee osteoarthritis, biomechanic load, knee trauma